border-1px($color) {
  position: relative;

  &:after {
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-top: 1px solid $color;
    content: '';
  }
}

.clearfix{
  display: inline-block;
  &:after{
    display: block;
    content: ".";
    height: 0;
    line-height: 0;
    clear: both;
    visibility: hidden;
  }
}
